TY - JOUR AU - Babiarz, A. AU - Klamka, J. AU - Niezabitowski, M. TI - Schauder’s fixed-point theorem in approximate controllability problems JO - International Journal of Applied Mathematics and Computer Science PY - 2016 SP - 263 EP - 275 VL - 26 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IJAMCS_2016_26_2_a0/ LA - en ID - IJAMCS_2016_26_2_a0 ER -